Added Sympiler Wrapper

CMakeLists.txt

@@ -49,6 +49,7 @@ endif()
 # Polysolve options
 option(POLYSOLVE_WITH_SANITIZERS    "Enable sanitizers in compilation targets"          OFF)
 # Polysolve options for enabling/disabling optional libraries
+option(POLYSOLVE_WITH_SYMPILER      "Enable sympiler library"                            ON)
 option(POLYSOLVE_WITH_ACCELERATE    "Enable Apple Accelerate" ${POLYSOLVE_ON_APPLE_SILICON})
 option(POLYSOLVE_WITH_CHOLMOD       "Enable Cholmod library"                             ON)
 option(POLYSOLVE_WITH_UMFPACK       "Enable UmfPack library"                             ON)
@@ -160,7 +161,14 @@ endif()
 include(json)
 target_link_libraries(polysolve PUBLIC nlohmann_json::nlohmann_json)
 
-# Accelerate solvers
+# Polysolve solver
+if (POLYSOLVE_WITH_SYMPILER)
+    include(sympiler)
+    target_link_libraries(polysolve PUBLIC sympiler::sym_sparse_blas)
+    target_compile_definitions(polysolve PUBLIC -DPOLYSOLVE_WITH_SYMPILER)
+endif()
+
+# Accelerate solver
 if(POLYSOLVE_WITH_ACCELERATE)
     target_compile_definitions(polysolve PUBLIC -DPOLYSOLVE_WITH_ACCELERATE)
 endif()

cmake/recipes/CPM.cmake

@@ -0,0 +1,36 @@
+# Source: https://github.com/cpm-cmake/CPM.cmake/blob/master/cmake/get_cpm.cmake
+# SPDX-License-Identifier: MIT
+
+set(CPM_DOWNLOAD_VERSION 0.38.1)
+
+if(CPM_SOURCE_CACHE)
+  set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+elseif(DEFINED ENV{CPM_SOURCE_CACHE})
+  set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+else()
+  set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+endif()
+
+# Expand relative path. This is important if the provided path contains a tilde (~)
+get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
+
+function(download_cpm)
+  message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
+  file(DOWNLOAD
+       https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+       ${CPM_DOWNLOAD_LOCATION}
+  )
+endfunction()
+
+if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
+  download_cpm()
+else()
+  # resume download if it previously failed
+  file(READ ${CPM_DOWNLOAD_LOCATION} check)
+  if("${check}" STREQUAL "")
+    download_cpm()
+  endif()
+  unset(check)
+endif()
+
+include(${CPM_DOWNLOAD_LOCATION})

cmake/recipes/sympiler.cmake

@@ -0,0 +1,48 @@
+#
+# Copyright 2020 Adobe. All rights reserved.
+# This file is licensed to you under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License. You may obtain a copy
+# of the License at http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under
+# the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+# OF ANY KIND, either express or implied. See the License for the specific language
+# governing permissions and limitations under the License.
+#
+if(TARGET sympiler::sym_sparse_blas)
+    return()
+endif()
+
+message(STATUS "Third-party (external): creating target 'sympiler::sym_sparse_blas'")
+
+if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm64" OR "${CMAKE_OSX_ARCHITECTURES}" MATCHES "arm64")
+    # apple M1
+    set(SYMPILER_BLAS_BACKEND "Apple" CACHE STRING "BLAS implementation for SYMPILER to use")
+else()
+    # windows, linux, apple intel
+    set(SYMPILER_BLAS_BACKEND "MKL" CACHE STRING "BLAS implementation for SYMPILER to use")
+endif()
+
+if(SYMPILER_BLAS_BACKEND STREQUAL "MKL")
+    message("INCLUDING MKL")
+    include(mkl)
+    if(NOT TARGET MKL::MKL)
+        add_library(MKL::MKL ALIAS mkl::mkl)
+    endif()
+endif()
+
+include(CPM)
+CPMAddPackage(
+    NAME sympiler
+    GITHUB_REPOSITORY ryansynk/sympiler
+    GIT_TAG 51bffd948f902b4606b8a8173a933ad9b54e29bf
+    OPTIONS "SYMPILER_BLAS_BACKEND MKL"
+)
+
+add_library(sympiler::sym_sparse_blas ALIAS sym_sparse_blas)
+
+include(GNUInstallDirs)
+target_include_directories(sym_sparse_blas INTERFACE
+    "$<BUILD_INTERFACE:${sympiler_SOURCE_DIR}>/include"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)

src/CMakeLists.txt

@@ -12,6 +12,8 @@ set(SOURCES
     polysolve/LinearSolverEigen.tpp
     polysolve/LinearSolverHypre.cpp
     polysolve/LinearSolverHypre.hpp
+    polysolve/LinearSolverSympiler.hpp
+    polysolve/LinearSolverSympiler.cpp
     polysolve/LinearSolverPardiso.cpp
     polysolve/LinearSolverPardiso.hpp
     polysolve/SaddlePointSolver.cpp

src/polysolve/LinearSolver.cpp

@@ -5,6 +5,9 @@
 
 // -----------------------------------------------------------------------------
 #include <Eigen/Sparse>
+#ifdef POLYSOLVE_WITH_SYMPILER
+#include <polysolve/LinearSolverSympiler.hpp>
+#endif
 #ifdef POLYSOLVE_WITH_ACCELERATE
 #include <Eigen/AccelerateSupport>
 #endif
@@ -191,6 +194,12 @@ namespace polysolve
         else if (solver == "Eigen::SparseLU")
         {
             RETURN_DIRECT_SOLVER_PTR(SparseLU, "Eigen::SparseLU");
+#ifdef POLYSOLVE_WITH_SYMPILER
+        }
+        else if (solver == "Sympiler")
+        {
+            return std::make_unique<LinearSolverSympiler>();
+#endif
 #ifdef POLYSOLVE_WITH_ACCELERATE
         }
         else if (solver == "Eigen::AccelerateLLT")
@@ -363,6 +372,9 @@ namespace polysolve
         return {{
             "Eigen::SimplicialLDLT",
             "Eigen::SparseLU",
+#ifdef POLYSOLVE_WITH_SYMPILER
+            "Sympiler",
+#endif
 #ifdef POLYSOLVE_WITH_ACCELERATE
             "Eigen::AccelerateLLT",
             "Eigen::AccelerateLDLT",

src/polysolve/LinearSolverSympiler.cpp

@@ -0,0 +1,78 @@
+#ifdef POLYSOLVE_WITH_SYMPILER
+
+#include <polysolve/LinearSolverSympiler.hpp>
+#include <Eigen/Core>
+
+namespace polysolve
+{
+    void LinearSolverSympiler::setSolverMode(int _solver_mode)
+    {
+        solver_mode = _solver_mode;
+    }
+
+    void LinearSolverSympiler::updateCSC()
+    {
+        m_A_csc->nzmax = m_A_copy.nonZeros();
+        m_A_csc->ncol = m_A_csc->nrow = m_A_copy.rows();
+        m_A_csc->p = m_A_copy.outerIndexPtr();
+        m_A_csc->i = m_A_copy.innerIndexPtr();
+
+        m_A_csc->x = m_A_copy.valuePtr();
+        m_A_csc->stype = -1;
+        m_A_csc->packed = 1;
+        m_A_csc->nz = nullptr;
+    }
+
+    void LinearSolverSympiler::setParameters(const json &params)
+    {
+        if (params.contains("Sympiler"))
+        {
+            if (params["Sympiler"].contains("solver_mode"))
+            {
+                setSolverMode(params["Sympiler"]["mtype"].get<int>());
+            }
+        }
+    }
+
+    void LinearSolverSympiler::getInfo(json &params) const
+    {
+        if (factorize_status == 1)
+        {
+            params["factorize_info"] = "Success";
+        }
+        else
+        {
+            params["factorize_info"] = "Failure";
+        }
+    }
+
+    void LinearSolverSympiler::analyzePattern(const StiffnessMatrix &A, const int precond_num)
+    {
+        m_A_copy = StiffnessMatrix(A);
+        updateCSC();
+        m_solver = std::make_unique<sym_lib::parsy::SolverSettings>(m_A_csc.get());
+        m_solver->symbolic_analysis();
+    }
+
+    // Factorize system matrix
+    void LinearSolverSympiler::factorize(const StiffnessMatrix &A)
+    {
+        // Only copy when matrix changes
+        if (!m_A_copy.isApprox(A))
+        {
+            m_A_copy = StiffnessMatrix(A);
+            updateCSC();
+        }
+        factorize_status = m_solver->numerical_factorization(m_A_csc.get());
+    }
+
+    // Solve the linear system Ax = b
+    void LinearSolverSympiler::solve(const Ref<const Eigen::VectorXd> b, Ref<Eigen::VectorXd> x)
+    {
+        double *x_ptr = m_solver->solve_only(b.data());
+        x = Eigen::Map<Eigen::VectorXd>(x_ptr, x.rows(), x.cols());
+    }
+
+} // namespace polysolve
+
+#endif

src/polysolve/LinearSolverSympiler.hpp

@@ -0,0 +1,59 @@
+#ifdef POLYSOLVE_WITH_SYMPILER
+
+#include <polysolve/LinearSolver.hpp>
+#include <sympiler/parsy/cholesky_solver.h>
+
+namespace polysolve
+{
+    class LinearSolverSympiler : public LinearSolver
+    {
+    public:
+        LinearSolverSympiler()
+            : m_solver(nullptr), m_A_csc(std::make_unique<sym_lib::parsy::CSC>()) {}
+        virtual ~LinearSolverSympiler() = default;
+
+    private:
+        POLYSOLVE_DELETE_MOVE_COPY(LinearSolverSympiler)
+
+    protected:
+        void setSolverMode(int _solver_mode);
+        void updateCSC();
+
+    public:
+        //////////////////////
+        // Public interface //
+        //////////////////////
+
+        // Set solver parameters
+        virtual void setParameters(const json &params) override;
+
+        // Retrieve status (success/failure) of factorization
+        virtual void getInfo(json &params) const override;
+
+        // Analyze sparsity pattern
+        virtual void analyzePattern(const StiffnessMatrix &A, const int precond_num) override;
+
+        // Factorize system matrix
+        virtual void factorize(const StiffnessMatrix &A) override;
+
+        // Solve the linear system Ax = b
+        virtual void solve(const Ref<const VectorXd> b, Ref<VectorXd> x) override;
+
+        // Name of the solver type (for debugging purposes)
+        virtual std::string name() const override { return "Sympiler"; }
+
+    private:
+        std::unique_ptr<sym_lib::parsy::SolverSettings> m_solver;
+        std::unique_ptr<sym_lib::parsy::CSC> m_A_csc;
+        polysolve::StiffnessMatrix m_A_copy;
+
+    protected:
+        ////////////////////
+        // Sympiler stuff //
+        ////////////////////
+        int solver_mode = 0; // 0 is normal solve, 1 is row/col addition
+        int factorize_status = -1;
+    };
+} // namespace polysolve
+
+#endif